140136631 has 4 divisors (see below), whose sum is σ = 146229552. Its totient is φ = 134043712.

The previous prime is 140136589. The next prime is 140136637. The reversal of 140136631 is 136631041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140136631 - 2⁹ = 140136119 is a prime.

It is a super-2 number, since 2×140136631² = 39276550696060322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140136596 and 140136605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140136637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3046426 + ... + 3046471.

It is an arithmetic number, because the mean of its divisors is an integer number (36557388).

Almost surely, 2^140136631 is an apocalyptic number.

140136631 is a deficient number, since it is larger than the sum of its proper divisors (6092921).

140136631 is an equidigital number, since it uses as much as digits as its factorization.

140136631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6092920.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 140136631 is about 11837.9318717418. The cubic root of 140136631 is about 519.4182732785.

Adding to 140136631 its reverse (136631041), we get a palindrome (276767672).

The spelling of 140136631 in words is "one hundred forty million, one hundred thirty-six thousand, six hundred thirty-one".